Vincent Colson - Academia.edu (original) (raw)

Papers by Vincent Colson

Revue de droit penal et de criminologie, 2017

Was Menschen bildet, 2018

A new integral representation is obtained for the star product corresponding to the s-ordering of... more A new integral representation is obtained for the star product corresponding to the s-ordering of the creation and annihilation operators. This parametric ordering convention introduced by Cahill and Glauber enables one to vary the type of ordering in a continuous way from normal order to antinormal order. Our derivation of the corresponding integral representation is based on using reproducing formulas for analytic and antianalytic functions. We also discuss a different representation whose kernel is a generalized function and compare the properties of this kernel with those of the kernels of another family of star products which are intermediate between the qp− and pq-quantization.

The purpose of this study is to investigate what the large difference between the price on the pr... more The purpose of this study is to investigate what the large difference between the price on the private forest market and the fair value established by the forest companies consists of, and why it appears. This is done in a trial to find out if the price on the private market could be used instead of the DCF model to give a more accurate fair value. Methodology: The foundation of this study is based on a qualitative method with in depth, face to-face interviews, but a quantitative approach is also used as a basis for the interviews. Theoretical Some previous research has been made regarding the forest companies' perspective: application of fair value, but no previous study has investigated the difference between the price on the private market and the fair value established by the forest companies. We have described general valuation theory and the development of different forest valuation models with their input variables in order to better understand the DCF model. Empirical The quantitative data has been gathered from LRF Konsult and from the forest foundation: companies' annual reports, and has then been compiled and analyzed. The qualitative data from the interviews works as a basis for the following analysis and conclusion. Conclusion: The study shows that soft values, conservatism by the forest companies and different purposes of owning forest are the main drivers explaining the difference between the market price on the private market and the fair value established by the forest companies. If the forest companies were to use the private market price instead of the DCF model, they would have to make several adjustments, which would probably be even more misleading than the current use of fair value. Definitions To make the study easier to interpret and understand, this section will present some central definitions which will be used throughout the study. BSEK Billion Swedish crowns Fertility The natural lumber-producing ability as measured by m 3 forest per hectares and per year (Skogsforsk, 2012). Hectare A unit of measure often applied within the forest industry. 100 × 100 = 10 000 ! (Skogsforsk, 2012). M 3 forest Forest cubic meter. A tree that is measured per cubic meter includes the volume of the stem, the top of the tree, the branches and the bark (Skogsforsk, 2012). Monetary values These are the values originating from the forest that easily can be measured in dollar and cents i.e. the income from a pruning. MSEK Million Swedish crowns P&P Companies Pulp and paper companies. Productive forestland The productive forestland is the part of the forest companies' total possessions that is able to produce the biological assets, which means that it is the remaining forestland when for example lakes, mines and 5 unproductive forestland are excluded. The land is often classified as productive when it produces more than one cubic meter of forest per hectare annually (SCA, 2012a). Pruning Rejection of old branches. Rotation period Production time for one generation of trees, from planting to natural regeneration or planting to harvesting (Skogsforsk, 2012). Silviculture Silviculture means taking care and cultivating the trees in the forest. Soft values These are the vales of the forest that cannot directly or easily be measured in dollars and cents. Soft values could for example the biodiversity, what the landscape or scenery looks like, hunting rights, recreational use and material benefits such as the existence of berries and mushrooms. Thinning Removal of trees in order to increase the growth of the remaining trees, by giving them more space and nourishment.

Background & aim: Menopause is one of the most critical stages in a woman’s life. Special attent... more Background & aim: Menopause is one of the most critical stages in a woman’s life. Special attention needs to be paid to the quality of life of menopausal women. Symptoms of genitourinary atrophy can affect women’s comfort and quality of life. The aim of this study was to compare two treatment methods of vitamin E suppository and conjugated estrogens vaginal cream on the quality of life of menopausal women with vaginal atrophy. Methods: This clinical trial was performed on 52 menopausal women (40-65 years old), referring to the gynecology clinic of Ghaem Hospital, Mashhad, Iran in 2013. Women were randomly assigned to two groups to use either conjugated estrogens vaginal cream or vitamin E suppository for 12 weeks. Women’s quality of life was measured in both groups before the study and 4, 8 and 12 weeks after the interventions. Data collection tools included a demographic questionnaire and Menopause-Specific Quality of Life (MENQOL) questionnaire. Fisher’s exact test, repeated meas...

Planejamento de experimentos para apoio à tomada de decisão em gestão de negócios e inovação, Dec 2, 2018

Infrastructure 1 Availability and capacity of actives. 2 Access to capital. 3 Fusions / acquisiti... more Infrastructure 1 Availability and capacity of actives. 2 Access to capital. 3 Fusions / acquisitions Personal 4 Fraudulent activities Process 5 Quality and rotation of suppliers 6 Change in customer demands Technology 7 Acquisition, maintenance, distribution, confidentiality and availability of data. 8 Availability, capacity, selection, development and reliability of the system Economic 9 Concession, default, credit and warranties degradation. 10 Pay-off, funding, cash flow 11 Derivatives, hedge, interest rates, exchange rates, actions, inflation 12 Commodity prices 13 Opposition between existing competitors, new competitors.

Fresenius' Journal of Analytical Chemistry, 1998

The so-called thermal "cleaning" applied in thermoluminescence analysis allows distinguishing TL ... more The so-called thermal "cleaning" applied in thermoluminescence analysis allows distinguishing TL signal originating from different traps of comparable thermal depths. Here, the detailed study on the suitability of a similar approach-which can be called optical "cleaning"-for the analysis of OSL process has been carried out by means of computer modelling. The optical "cleaning" is realized by short optical stimulation applied directly after irradiation. It turns out that this approach does not help to separate signals related to various traps having similar optical cross-section (OCS) values. For some sets of trap parameters, sufficiently good reconstruction of the trap optical cross-sections can be achieved by the analysis of the conventional OSL curve obtained directly after sample irradiation, while the OSL curve analysis after "cleaning" does not provide any additional data. For other cases the analysis of both curves with and without "cleaning" leads to optical crosssection values different from those assumed in the model, but just in such situations the optical "cleaning" can be helpful. The differences between the OSL components of the conventional curve and the one obtained after "cleaning" can be used as indicators of an incompatibility of the trap parameters obtained from the OSL analysis with their actual values.

In Wallonia, private forest accounts for more than 50 % of the regional forest. The ownerships ar... more In Wallonia, private forest accounts for more than 50 % of the regional forest. The ownerships are very scattered and heterogeneous. One must never forget the extraordinary number of small properties and the diver-sity of attitudes underlying woodland ownership. Such diverse approaches remain a handicap to judicious forest development, which is exacerbated by the lack of a fully comprehensive regional forest policy. A comparison is made with the French private forest which has a similar structure but for which a specific forest policy has been developed and continuously improved for about 40 years.

Geochronometria, 2014

Saint James Church in Toruń is one of the most important gothic monuments in Poland. The date of ... more Saint James Church in Toruń is one of the most important gothic monuments in Poland. The date of the beginning of its construction is known from historical reports but the earlier history of the site remains undiscovered. During the archaeological excavations in years 2010 and 2011 five brick samples were collected for luminescence dating as well as four additional samples from the brick surroundings for the dose rate estimation. The equivalent dose was determined by TL and OSL methods. The TL results differ significantly from the OSL results but the last ones are verified by historical knowledge and radiocarbon dating. Establishing the dose rate from gamma rays needs a special attention because of the complex course of the foundations of the church. The details of the applied approach are presented in the current work. The results obtained indicate that a solid brick construction existed at the site of the presbytery of the Saint James Church before it was build.

Journal of Urban Technology, 1997

Journal of Luminescence, 2014

During time-resolved optical stimulation experiments (TR-OSL), one uses short light pulses to sep... more During time-resolved optical stimulation experiments (TR-OSL), one uses short light pulses to separate the stimulation and emission of luminescence in time. Experimental TR-OSL results show that the luminescence lifetime in quartz of sedimentary origin is independent of annealing temperature below 500 1C, but decreases monotonically thereafter. These results have been interpreted previously empirically on the basis of the existence of two separate luminescence centers L H and L L in quartz, each with its own distinct luminescence lifetime. Additional experimental evidence also supports the presence of a non-luminescent hole reservoir R, which plays a critical role in the predose effect in this material. This paper extends a recently published analytical model for thermal quenching in quartz, to include the two luminescence centers L H and L L , as well as the hole reservoir R. The new extended model involves localized electronic transitions between energy states within the two luminescence centers, and is described by a system of differential equations based on the Mott-Seitz mechanism of thermal quenching. It is shown that by using simplifying physical assumptions, one can obtain analytical solutions for the intensity of the light during a TR-OSL experiment carried out with previously annealed samples. These analytical expressions are found to be in good agreement with the numerical solutions of the equations. The results from the model are shown to be in quantitative agreement with published experimental data for commercially available quartz samples. Specifically the model describes the variation of the luminescence lifetimes with (a) annealing temperatures between room temperature and 900 1C, and (b) with stimulation temperatures between 20 and 200 1C. This paper also reports new radioluminescence (RL) measurements carried out using the same commercially available quartz samples. Gaussian deconvolution of the RL emission spectra was carried out using a total of seven emission bands between 1.5 and 4.5 eV, and the behavior of these bands was examined as a function of the annealing temperature. An emission band at ∼3.44 eV (360 nm) was found to be strongly enhanced when the annealing temperature was increased to 500 1C, and this band underwent a significant reduction in intensity with further increase in temperature. Furthermore, a new emission band at ∼3.73 eV (330 nm) became apparent for annealing temperatures in the range 600-700 1C. These new experimental results are discussed within the context of the model presented in this paper.

IEEE Transactions on Power Electronics, 2006

Page 1. IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 6, NOVEMBER 2006 1769 Practical Eval... more Page 1. IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 6, NOVEMBER 2006 1769 Practical Evaluation of Dimming Control Methods for Electronic Ballasts Pok Wai Tam, Stephen TS Lee, SY Ron Hui, Fellow ...